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Business Combination Purchase Price Allocation (Detail) - USD ($) $ in Thousands | Mar. 31, 2018 | Jan. 01, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Business Acquisition [Line Items] |  |  |
Goodwill | $ 44,779 |  | $ 40,927
Rocky Mountain Offender Management Systems, LLC |  |  |
Business Acquisition [Line Items] |  |  |
Property and equipment |  | $ 800 |
Intangible assets |  | 3,100 |
Total identifiable assets and liabilities |  | 3,900 |
Goodwill |  | 3,100 |
Total consideration |  | $ 7,000 |

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